Linear Predictor (LP) of Signorini et al for Probability of Survival After Traumatic Brain Injury

Description

Signorini et al used a linear predictor (LP) to determine the probability of survival after traumatic brain injury. This can help identify patients who may benefit from closer monitoring and more aggressive management. The authors are from the University of Edinburgh.

Parameters identified on admission:

(1) age of the patient in years

(2) Glasgow Coma Score (GCS)

(3) Injury Severity Score (ISS)

(4) CT scan findings

(5) number of pupils reacting to light

Parameter	Finding	Points
age of the patient	<= 50 years	0
	> 50 years	(age - 50)
Glasgow coma score		<GCS>
ISS		<ISS>
CT scan	no hematoma	1
	hematoma present	0
number of reacting pupils	2	0
	1	-0.512
	0	-1.784

LP = LN(odds of survival) =

= (0.27 * (points for GCS)) - (0.121 * (points for age)) - (0.061 * (points for ISS)) + (1.26 * (points for CT scan)) + (points for pupils) + 1.735

probability of survival =

= 1 / (1 + EXP((-1) * LP))

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Description

Specialty

ICD-10